Google geocode => OpenLayers Map.setCenter

gistfile1.js

function toWebMercator(googLatLng) {
  // you'll have to put your conversion code here (not included in this gist)
  return { x: googLatLng.lng(), y: googLatLng.lat() };
}

geocoder.geocode({ address: "somewhere" }, function (result, status) {
  if (status == google.maps.GeocoderStatus.OK && result.length > 0) {
    var

    first = result[0],
    
    center = toWebMercator(first.geometry.location),

    viewport = first.geometry.viewport,
    viewportSW = viewport.getSouthWest(),
    viewportNE = viewport.getNorthEast(),

    min = toWebMercator(viewportSW),
    max = toWebMercator(viewportNE),

    zoom = mapMain.getZoomForExtent(new OpenLayers.Bounds(min.x, min.y, max.x, max.y));

    mapMain.setCenter(new OpenLayers.LonLat(p.x, p.y), Math.min(AppContext.addressZoom, zoom));
  }
});